[Mrs. Don-o]

Nowhere, neither in that quote you just offered or anywhere else in the NT, is anyone called a son or daughter of Mary except Jesus.

Except Rev. 12:17, where ~all~ those "who keep God's commandments and bear witness to Jesus" are called Mary's offspring.

[TRY ONE]

The real issue is the false concept: the perpetual virginity of Mary!

Matthew 1: 25

“and (Joseph) kept her (Mary) a virgin until (UNTIL) she gave birth to a Son; and he called His name Jesus.”

So Mary was a virgin UNTIL Jesus was born!

And after that what happened? Mary had at least 6 more children.